I think most memorable has to go to Suzi Nine Millimeters. Along with Lady of the Lamp, she's the classic head that you have to use. I don't think I know anyone that hasn't x] Although as for my favourite head, I'm going to go with either Paparazzi or the Vacuum Cleaner quaker. The idea of these two heads is just wonderful and very unique, as well as being two incredibly useful and powerful heads to use. And as for secret heads the Enlightened Monk omg. That was the hardest head ever to get! ;; It took me literally days of replaying that level but eventually I managed to complete the headcase. c:
... Man I miss this game so much. x]